Automatic visibility correction viewfinder system for optical de

Details Automatic visibility correction viewfinder system for optical de Automatic visibility correction viewfinder system for optical de

1988-02-23

1989-05-09

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351206, 354 62, A61B 310, A61B 314

Patent

active

048283819

ABSTRACT:
A viewfinder system for cameras and the like which automatically corrects its visibility to accommodate the particular version of the viewer. A lens in the viewfinder optical system, which is moveable to adjust visibility of the viewfinder, is automatically adjusted in response to the output of an eye refractometer that is constructed adjacent to and forms a part of the viewfinder optical system.

REFERENCES:
patent: 4318585 (1982-03-01), Matsumura

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